package UseString.demo02;

public class Test {
    public static void main(String[] args) {
        int[] arr = {1,2,3,4,5};
        String intStr = arrToString(arr);
        System.out.println(intStr);

    }

    public static String arrToString(int[] arr){
        if(arr == null){
            return "";
        }
        if(arr.length == 0){
            return "[]";
        }
        String result = "[";
        for (int i = 0; i < arr.length; i++) {
            if(i==arr.length-1){
                result = result + arr[i];
            }else {
                result = result + arr[i] + ",";
            }
        }
        result = result +"]";
        return result;

    }
}
